System for metering electrical energy with remote time signal correlation

Abstract

A system for monitoring electrical energy consumption in a circuit in which signals from the current sensor are correlated with a time signal received from a remote location.

Having described our invention in such terms as to enable those skilled in the art to understand and practice it, We claim: 
     
       1. In a system for metering the electrical energy consumption in each of a plurality of separate circuits and correlating said energy consumption with time, including in each of said separate circuits meter means for sensing the electrical energy consumption in each said circuit and for generating signals in response thereto,   timing means for generating time signals, and   logic means in each of said circuits for correlating said energy consumption signals and said time signals, the improvements comprising:     receiver--logic means in each of said plurality of separate circuits for receiving a common actual time signal generated at and transmitted from a location remote from said circuits, and for separately correlating said time signal with said electrical energy consumption signals for each of said circuits to provide correlated time-current data for each of said separate circuits.   
     
     
       2. The improvements of claim 1 in which said time signal is a local time signal. 
     
     
       3. The improvements of claim 1 in which said time signal is transmitted to said metering system on the power line supplying electrical energy to said circuit. 
     
     
       4. The improvements of claim 1 which includes means for temporarily storing said time-current data resulting from the correlation of said signals. 
     
     
       5. The improvements of claim 1 which include readout means for displaying said time-current data at the location of said circuit. 
     
     
       6. The improvements of claim 1, including means for periodically transferring said stored data to an external memory.